php开发中常用函数总结_php常用函数总结
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php开发中常用函数总结
1.获取IP2.时间的增加3.检查日期是否合法日期4.时间比较函数，返回两个日期相差几秒、几分钟、几小时或几天5.PHP重定向6.获取访问者浏览器7.获取访问者操作系统8.文件格式类9.php生成excel文档10.时间比较问题11.提取页面和浏览器提交的变量，作用相当于使PHP.INI开了全局变量12.读取文件函数13.写入文件函数14.页面快速转向15.产生随机字符串函数16.截取一定长度的字符串（该函数对GB2312使用有效）17.取得客户端IP地址18.判断邮箱地址19.分页（两个函数配合使用）20.获取新插入数据的ID21.获得当前的脚本网址22.把全角数字转为半角数字23.去除HTML标记24.相对路径转化成绝对路径26.取得所有链接27.HTML表格的每行转为CSV格式数组28.将HTML表格的每行每列转为数组，采集表格数据29.返回字符串中的所有单词 $distinct=true 去除重复30.打印出为本PHP项目做出贡献的人员的清单
function GetIP(){ //获取IP
if($_SERVER[“HTTP_X_FORWARDED_FOR”])
$ip = $_SERVER[“HTTP_X_FORWARDED_FOR”];
else if($_SERVER[“HTTP_CLIENT_IP”])
$ip = $_SERVER[“HTTP_CLIENT_IP”];
else if($_SERVER[“REMOTE_ADDR”])
$ip = $_SERVER[“REMOTE_ADDR”];
else if(getenv(“HTTP_X_FORWARDED_FOR”))
$ip = getenv(“HTTP_X_FORWARDED_FOR”);
else if(getenv(“HTTP_CLIENT_IP”))
$ip = getenv(“HTTP_CLIENT_IP”);
else if(getenv(“REMOTE_ADDR”))
$ip = getenv(“REMOTE_ADDR”);
else
$ip = “Unknown”;
return $ip;}?>{downsource}
$dateArr = explode(“-”, $date);$value[$unit] = $int;return date(“Y-m-d”, mktime(0,0,0, $dateArr[1] + $value['m'], $dateArr[2] + $value['d'], $dateArr[0] + $value['y']));}function GetWeekDay($date){ //计算出给出的日期是星期几
$dateArr = explode(“-”, $date);return date(“w”, mktime(0,0,0,$dateArr[1],$dateArr[2],$dateArr[0]));}?>{downsource}
$dateArr = explode(“-”, $date);if(is_numeric($dateArr[0])&& is_numeric($dateArr[1])&& is_numeric($dateArr[2])){ return checkdate($dateArr[1],$dateArr[2],$dateArr[0]);} return false;}function check_time($time){ //检查时间是否合法时间
$timeArr = explode(“:”, $time);if(is_numeric($timeArr[0])&& is_numeric($timeArr[1])&& is_numeric($timeArr[2])){ if(($timeArr[0] >= 0 && $timeArr[0] = 0 && $timeArr[1] = 0 && $timeArr[2]
switch($unit){ case 's': $dividend = 1;break;case 'i': $dividend = 60;break;case 'h': $dividend = 3600;break;case 'd': $dividend = 86400;break;default: $dividend = 86400;} $time1 = strtotime($date1);$time2 = strtotime($date2);if($time1 && $time2)return(float)($time11;mt_srand((double)microtime()* 1000000);for($i = 0;$i {downsource}截取一定长度的字符串（该函数对GB2312使用有效） $length){ if($){ $length=$length-3;$addstr=@#...@#;} for($i = 0;$i 127){ $wordscut.= $string[$i].$string[$i + 1];$i++;} else { $wordscut.= $string[$i];} } return $wordscut.$addstr;}return $string;}?>{downsource}取得客户端IP地址{downsource}判断邮箱地址{downsource}分页（两个函数配合使用）global $page,$totalpage;$out=“共”.$totalpage.“页 ”;$linkNum =4;$start =($page-round($linkNum/2))>0 ?($page-round($linkNum/2)): “1”;$end =($page+round($linkNum/2))1)$out.= “第一页 ”;if($start>1)$out.=“..”;for($t=$start;$t[“.$t.”] “ : ”$t “;}if($end>>..”;if($page$totalpage)$out.= “ 最后页”;return $out;}?>{downsource}获取新插入数据的ID{downsource}//获得当前的脚本网址
if(empty($_SERVER[“QUERY_STRING”]))$nowurl = $scriptName;else $nowurl = $scriptName.“?”.$_SERVER[“QUERY_STRING”];} return $nowurl;}?>{downsource}//把全角数字转为半角数字”,$txt);$txt = preg_replace(“/[rn]{1,}/isU”,“rn”,$txt);return $txt;}?>{downsource}//相对路径转化成绝对路径
preg_match('/(http|https|ftp):///', $feed_url, $protocol);$server_url = preg_replace(“/(http|https|ftp|news):///”, “”, $feed_url);
$server_url = preg_replace(“//.*/”, “”, $server_url);
if($server_url == ''){
return $content;
}
if(iet($protocol[0])){
$new_content = preg_replace('/href=“//', 'href=”'.$protocol[0].$server_url.'/', $content);
$new_content = preg_replace('/src=“//', 'src=”'.$protocol[0].$server_url.'/', $new_content);
} else {
$new_content = $content;
}
return $new_content;} ?>{downsource}//取得所有链接
preg_match_all('/“' ]+)[”|']?s*[^>]*>([^>]+)/i',$code,$arr);
return array('name'=>$arr[2],'url'=>$arr[1]);}?>{downsource}//HTML表格的每行转为CSV格式数组'si”,'“',$table);$table = str_replace(”“,'”,',$table);$table = str_replace(“”,“{tr}”,$table);//去掉 HTML 标记
$table = preg_replace(“']*?>'si”,“”,$table);//去掉空白字符
$table = preg_replace(“'([rn])[s]+'”,“”,$table);$table = str_replace(“ ”,“”,$table);$table = str_replace(“ ”,“”,$table);$table = explode(“,{tr}”,$table);
array_pop($table);return $table;}?>{downsource}//将HTML表格的每行每列转为数组，采集表格数据'si”,“”,$table);$table = preg_replace(“']*?>'si”,“”,$table);$table = preg_replace(“']*?>'si”,“”,$table);$table = str_replace(“”,“{tr}”,$table);$table = str_replace(“”,“{td}”,$table);//去掉 HTML 标记
$table = preg_replace(“']*?>'si”,“”,$table);//去掉空白字符
$table = preg_replace(“'([rn])[s]+'”,“”,$table);$table = str_replace(“ ”,“”,$table);$table = str_replace(“ ”,“”,$table);
$table = explode('{tr}', $table);
array_pop($table);foreach($table as $key=>$tr){ $td = explode('{td}', $tr);array_pop($td);$td_array[] = $td;} return $td_array;}?>{downsource}//返回字符串中的所有单词 $distinct=true 去除重复{downsource}//打印出为本PHP项目做出贡献的人员的清单 //生成随机密码function randStr($len=6){//用来产生密码的字符串$chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijkmnpqrstuvwxyz23456789';$paword=“”;while(strlen($paword)
$paword.=substr($chars,(mt_rand()%strlen($chars)),1);return $paword;
}
